1. 10-14-2010
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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Newbie needs some help with his model interpretation

Hello, i am quite new in the world of statistical problems :) I have read some lecture notes and books to solve my current problem, but i am note...

• Replies: 0
• Views: 414
12-24-2016, 09:52 AM
2. ### Regression on estimated variables

I'm making a two-step analysis for my data. First Step: I've collected inflation and interest rate data for 25 countries in a monthly frequency...

• Replies: 2
• Views: 487
12-23-2016, 09:52 AM
3. ### Beginner's question: Is profit/loss data always ratio in nature? How to treat it?

Hello, I'm afraid this is another beginner's question. I've only recently grasped the fundamentals of linear and multiple linear regression and I...

• Replies: 3
• Views: 473
12-21-2016, 06:06 PM
4. ### Random intercept only for 1 subgroup in lmer

Dear all, suppose I have a case study with 3 different populations, A, B and C. For all groups I have data on, e.g. body mass, length and sex of a...

• Replies: 2
• Views: 444
12-21-2016, 12:12 PM
5. ### Calculating probabilities from logit parameters estimated with effect coding

Hello, I calculated this multinomial logit model using an effect coding (-1 0 1). The variable edu3 is the education level (3 categories), sex has...

• Replies: 0
• Views: 368
12-21-2016, 03:39 AM
6. ### moderation in SPSS vs. PROCESS

Hi. I did mediation and moderation analysis of one model in 2 programs: SPSS and PROCESS (macro). Mediation was the same, but moderation was...

• Replies: 2
• Views: 769
12-19-2016, 08:35 AM
7. ### 3-way ANOVA for paired groups and repeated measures or a GEE

Hi! I need help for data analysis of my masters.I work with awake rats in pharmacology experiments. In my experiment I have some groups of treatment...

• Replies: 2
• Views: 459
12-18-2016, 11:01 AM
8. ### When to use Augmented Dickey Fuller test vs Dickey Fuller Test - Time series

Checking a variable for I(1) process, when should i use a ADF vs DF test?

• Replies: 1
• Views: 357
12-17-2016, 12:30 PM
9. ### Trying to think of alternative methods to approaching my model for dynamic pricing

Right now i run a pricing experiment where 25%of users get one of 4 random prices. After collecting sufficient data, I split my data into training...

• Replies: 0
• Views: 385
12-16-2016, 10:37 AM
10. ### help in model

I have a data set like that ID Wight age sex season region response 1 60 40 1 4 2 1000 2 65 ...

• Replies: 1
• Views: 368
12-16-2016, 09:00 AM
11. ### Repeated Measures model with Covariates

Hi Everyone, i am struggling with finding a good way to analyze a dataset. The design is this: I have 25(n) subjects, all of them are tested in an...

• Replies: 1
• Views: 390
12-16-2016, 02:23 AM
12. ### How to calculate residual covariance in R

I know it is may be a silly question but I am looking for an answer if I fitted a linear model c<- lm (y~ a+ b) I need to get the residual...

• Replies: 1
• Views: 421
12-16-2016, 02:18 AM
13. ### Linear Regression - Beginner Need Help

Hello everyone, I have a simple exercise to do about linear regressions and models but I have a few doubts. The exercise gives you 2 vectors(let's...

• Replies: 4
• Views: 497
12-14-2016, 03:04 PM
14. ### Advice on OLS analysis

Hello Everyone, I’m writing a paper on the relationship between weather on daily public bike share system usage. I’m looking for a bit of advice...

• Replies: 0
• Views: 353
12-14-2016, 12:59 PM
15. ### Adaptive Lasso and CrossValidation for SNV selection

Hello everyone, I have available 17 000 variables (SNV frequencies, a certain number of zeros) for 40 patients. Each patient is represented by its...

• Replies: 3
• Views: 505
12-13-2016, 11:51 AM
16. ### SEM versus multiple regression?

Hello. I have a within-subjects longitudinal design with two time points. There are two DVs and 3 IVs. All are measured at both time points. I used a...

• Replies: 1
• Views: 391
12-13-2016, 10:41 AM
17. ### Mixed effects using nlme in R

If I include an interaction (time*score) in my model the main effect (score) is significant. However, if I remove the covariate (time), the effect...

• Replies: 3
• Views: 577
12-13-2016, 03:44 AM
18. ### mixed effects influence of interaction

Can someone confirm that the following are correct. I'm trying to model both the random intercept and random intercept/slope models. Random...

• Replies: 2
• Views: 340
12-13-2016, 03:25 AM
19. ### Poverty analysis and multiple linear regression

Hi. I have a dataset and I intend to use multiple linear regression analysis with excel since the dataset isn't that massive in volume, just about...

• Replies: 0
• Views: 358
12-12-2016, 07:37 AM
20. ### Urgent: data format in regression analyses

Hi all, I'm suffering a lit bit with some data I have to analyse (my first time...) and I have many doubts. We manipulated 3 IVs that were shown...

• Replies: 0
• Views: 370
12-10-2016, 11:13 PM
21. ### Regression with two data sets?

I have two data sets. Set 1 contains daily flights and delay data: Flight Date Carrier Departure Delay, ranging from 0 to 1650 minutes. ...

• Replies: 1
• Views: 443
12-10-2016, 10:35 PM
22. ### Need help with data for regression analysis

I have extracted the following values from Draper and Smith (1998) for independent variable X, dependent variable Y for regression analysis: ...

• Replies: 2
• Views: 474
12-10-2016, 10:09 PM
23. ### Table interpretation (odds)

Can someone help me interpret and understand this table? The question is: What effect does the age have on the odds for bodyweight=1 for persons who...

• Replies: 2
• Views: 368
12-09-2016, 05:06 PM
24. ### conditional logit model_help with data interpretation

0 down vote favorite I have performed a clogit following the instruction of Aizaki et al.2012 but I am not sure on how to interpret some results...

• Replies: 4
• Views: 400
12-09-2016, 09:26 AM
25. ### Logistic Regression - Predicted Probabilities with unknown variables

Hi all, I'm wondering about how to calculate predicted probabilities using a binary logistic regression model when one or more of the variables in...

• Replies: 2
• Views: 389
12-07-2016, 10:11 AM
26. ### Hello, I need some help please with two problems

Hey guys, I have been struggling in this class and I am down to the last week, I have to pass this homework and extra credit problem to pass the...

• Replies: 2
• Views: 505
12-04-2016, 08:13 PM
27. ### Regression for comparing two groups on one variable? And t-test with survey data?

Hi - I have two populations / groups that I need to compare on one variable. Now usually I would use a t-test or anova but ive been told that...

• Replies: 2
• Views: 394
12-02-2016, 04:41 PM
28. ### Multiple Logistic Regression question

Greetings, I have three categorical IVs and one categorical DV. However, the DV is a self-reported ranking from 1 to 4 (1= not important, 4 = very...

• Replies: 4
• Views: 391
12-01-2016, 01:46 PM
29. ### Which analysis represents better the "worse-ness" of my linear regression?

Hello all, If I have two sets of data points, for instance: 1 10 2 14 3 17 4 12 5 19

• Replies: 2
• Views: 366
11-29-2016, 07:12 AM
30. ### P-value for a regression where expected slope is 1:1

Hi, I am comparing two values for vegetation cover from two time periods. The expected value is y=x for the slope. I am curious how to calculate a...

• Replies: 6
• Views: 547
11-26-2016, 09:40 AM
31. ### Repeated measures question

Hello. I have taken day to day repeated measures in number of predictor variables as well as some other ordinal dvs. I want to meaure the effect of...

• Replies: 4
• Views: 559
11-24-2016, 12:39 PM
32. ### Least squares estimate of alpha and beta

My group have different opinions towards the following question: Find the least squares estimate of alpha and beta of the mechanistic growth...

• Replies: 1
• Views: 370
11-24-2016, 10:23 AM
33. ### Standard Regression Analysis / urgent help for stats beginner.

Hi Guys! I'm fairly new to statistics and am conducting a standard regression analysis with 1 predictor variable ( following from a pearsons...

• Replies: 5
• Views: 413
11-22-2016, 12:57 PM
34. ### Nominal vs. Ordinal

Say i'm using age groups which are not equal in size and interval (1-2,2-4,5-8years) is it better when using a regression model to set this variable...

• Replies: 3
• Views: 417
11-21-2016, 04:40 PM
35. ### Poission with random effects

Hi, I have two levels in my poission regression model with random effects (children and family level) which predicts count data after i get the...

• Replies: 0
• Views: 314
11-20-2016, 04:37 PM
36. ### Help with multilevel multinomial logistic regression and missing data

Hi all - I would really appreciate some thoughts/advice. I'm working with survey data containing individual responses nested within a number of...

• Replies: 0
• Views: 547
11-16-2016, 04:42 PM
37. ### What experimental design would be most appropriate?

In my study I have two study groups: Group A is composed of X subjects which are either males or females, and every subject is characterized by...

• Replies: 0
• Views: 331
11-15-2016, 01:18 PM
38. ### logistic regression or survival analysis?

Hello, I have two main questions that I hope you help me answer. Let me give you the scenario first. Let’s say that some students in a school are...

• Replies: 4
• Views: 425
11-15-2016, 10:41 AM
39. ### How to parameterize this crazy data?

So, a colleague of mine, who is a survey methodologist, is proposing to do an experiment on a survey. * The purpose of the experiment is to see...

• Replies: 0
• Views: 298
11-14-2016, 07:00 PM
40. ### Post-Hoc Power Analysis (G*Power) for simple linear regression

Hey everyone! I conducted a simple linear regression with non-significant results. Now I would like to analyze the power of this calculation using...

• Replies: 0
• Views: 429
11-11-2016, 07:00 AM
41. ### Exam pass rate analysis

Hi, looking for some help with some analysis I am looking at on Minitab for exam pass marks. I have a data set which shows global student...

• Replies: 1
• Views: 362
11-10-2016, 11:47 AM
42. ### Have 4 dependent and 10 independent variables - which test should I use?

Hi all, I'm interested in the potential effects of water pollution on feather color of a bird. For this, I calculated 4 color variables for each...

• Replies: 0
• Views: 345
11-09-2016, 04:47 PM

Hi everyone, I'm trying to wrap my head around multilevel (or mixed-effect) models, but not quite succeeding. I have the following data from a...

• Replies: 0
• Views: 376
11-07-2016, 03:46 PM
44. ### Correlation with residuals of regression

Hi all, Let's say I have one DV (X) and 5 IV's, A, B, C, D and E. I'm specifically interested in the effect of E. I could perform a regression...

• Replies: 3
• Views: 409
11-07-2016, 10:18 AM
45. ### Test for comparing correlation values. The winner is?

• Replies: 2
• Views: 454
11-05-2016, 07:10 AM
46. ### Calculating predicted probabilities from a logistic regression model SPSS

Hello everyone, I am trying to calculate individual predicted probabilities from a logistic regression model with SPSS (to describe how a individual...

• Replies: 6
• Views: 740
11-01-2016, 04:52 PM
47. ### Calculation of parameter uncertainties when using method of least squares

Hi everyone, I am struggling with a maybe simple problem. I have a set of data points (x,y) for which I would like to derive a fitting function of...

• Replies: 1
• Views: 472
11-01-2016, 05:41 AM
48. ### Help with my hierarchal regression

Hi Guys I'm accomplishing a hierarchal regression for my thesis and I'm a bit stumped. My hierarchal regression is trying to assess the link...

• Replies: 3
• Views: 435
10-30-2016, 02:51 AM
49. ### bootstrap regression question

I have a slightly different twist on the normal application of bootstrapping and regression. Here’s the problem… I have a population of people...

• Replies: 1
• Views: 394
10-28-2016, 09:09 AM
50. ### Relative Weights Analysis | Any good step-by-step guides out there?

I am trying to conduct relative weights analysis on employee engagement data to prioritize where our org focuses its efforts. I'm running SPSS...

• Replies: 0
• Views: 259
10-25-2016, 03:03 PM
51. ### How to use Akaike's Information Criterion (AIC) for manual model reduction?

Hi all, I wondered if anybody can explain to me how I can use the AIC for manual reduction of my GLM. I calculate a GLM with the following...

• Replies: 1
• Views: 486
10-24-2016, 11:58 PM
52. ### Cross-sectional dependence, heteroskedasticity and serial correlation

*** solved

• Replies: 0
• Views: 304
10-24-2016, 03:51 PM

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